Top 8 True Smart Battery Isolator – Automotive Replacement Battery Switches

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1. JayCorp


12V Dual Battery 140A Smart Isolator VSR Voltage Sensitive Relay for Auto/Boat/RV

JayCorp #ad - 12v 140a smart isolator with cut-In:13. 4v, cut-out:12. 9v. Easy connection at the battery. Easy to install anywhere - Water and dust resistant - Mounting screws and detailed instructions included. Conventional diode isolators incur a minimum of 06 volt drop. The smart isolator has no voltage drop. Compact 2. 68" 68mm by 2. 68" 68mm by 1. 93" 49mm size. No need to bypass existing alternator wiring.
BrandJayCorp #ad
ManufacturerTrue Amalgamated #ad
Height1.93 Inches
Length2.68 Inches
Weight0.69 Pounds
Width2.68 Inches
Part NumberVSR12

2. True Amalgamated


TRUE® UTV-SBI-19L Smart Lithium Isolator for UTVs

True Amalgamated #ad - Stronger. For lithium Batteries. Industry's simplest installation. At least one of your batteries should be Lithium. The only 100% utv designed battery Isolator Avaliable w/PEP Lithium Only.
BrandTrue Amalgamated #ad
ManufacturerTrue Amalgamated (TrueAm) #ad
Part NumberUTV-SBI-19L
Warranty1 year free replacement from date of purchase. Lifetime flat fee replacement there after.

3. True Amalgamated


TRUE® UTV-SBI-18 Smart Isolator for UTVs

True Amalgamated #ad - Smarter. Smaller. The only 100% utv designed battery Isolator Avaliable w/PEP. Industry's simplest installation. Stronger.
BrandTrue Amalgamated #ad
ManufacturerTrue Amalgamated (TrueAm) #ad
Height2 Inches
Length5 Inches
Width2 Inches
Part NumberUTV-SBI-18
Warranty1 year from date shipped

4. MaySpare


Truck, Battery Starter Controller Heavy Duty Power Switch Charge Relay, 250 AMP Dual Battery Smart Isolator Universal 12V/24V Voltage Sensitive Relay Intelligent Dual Battery Isolator for Car, ATV

MaySpare #ad - No need to discharge your vehicle's original battery by trying your new equipment off-road. Function: 250amp battery isolator is a primary battery saver, which used to combine two batteries when an alternator is charging engine running and isolate them when not charging engine off so you can still start your vehicle.

Easy to install, just power wire in, power wire out. Voltage: high current 250 amp/ continue current: 250A normally open/ Universal application 12V/24V, LCD display voltage of two batteries. Automatically connection voltage delay 5 seconds : 13.

5v-16v12v working voltage;27v-32v24v working voltage/ Automatically Disconnect Voltage Delay 5 seconds : 12. 5v, disconnect immediately if it is below 12. 5 v. Designed with small size, boats, utvs, can fit anywhere!/ Wide Use on a variety of vehicles--12V/24V Trucks, rvs, off-road vehicle, ATVs, Vans, Caravan & Camping Applications.
BrandMaySpare #ad
ManufacturerMaySpare #ad
Part NumberDual Battery Relay



Fits Trucks, SUV, Complete VSR Double Battery Automatic Charger, ATV, Boats & More, Upgraded, ATV, Dual Battery Isolator Kit, HORSMILE 12V 140Amp Voltage Sensitive Relay & Wiring Cable Kit, UTV

HORSMILE #ad - Easy to install - no alternator or ignition connection needed, screws, connectors, including leads, zip ties, You don't need any additional components to complete installation as everything is included in the kit, and more. It features a voltage sensitive chip ensuring your primary battery is always ready for your vehicle to run.

Voltage sensitive Relay VSR cuts in at 13. 3 volts and cuts out at 12. 8 volts to ensure your primary battery is always charged and ready to start your vehicle. Rugged durability -this dual battery isolator kit is all you need to charge a dual battery system. Buy with confidence - every 140 amp dual battery isolator is backed by an industry leading 12-month Warranty. If you are not 100% satisfied with your purchase, Simply Take Advantage of the "No Questions Asked, 30-Day Money Back" Guarantee. This dual battery isolator is also built to withstand extreme weather environments, vibration and is water resistant.

Voltage sensitive relay - the automatic 140 amp dual battery isolator is all you need to charge Two Battery Systems. It's like having two separate power sources for each battery while only having one alternator! Fits a wide variety of vehicles - this dual battery isolator kit with printed installation instruction manual gives You the Power for Your Recreation Without Needing to Worry About Getting Home After. 12v, suitable for 12v 4wd, Marine, Truck, 12.8v cut-out voltage, 140A, 13.
ManufacturerHorsmile #ad
Height2.09 Inches
Length2.64 Inches
Weight3.75 Pounds
Width2.64 Inches
Part NumberSR50669-12C

6. True Amalgamated


True UTV-SBI-CK UTV Dual Battery Kit.

True Amalgamated #ad - 1- true 12 inch sealed Black 6ga Cable with two 6mm lugs. 1- true utv-sbi-18 isolator with silicon insulators and 3M Dual Lock fastener. 1- true 18 inch sealed Red 6ga Cable with two 6mm lugs. 1- true 12 inch sealed Red 6ga Cable with two 6mm lugs. Any returns authorized by amazon will not be accepted.
BrandTrue Amalgamated #ad
ManufacturerTrue Amalgamated (TrueAm) #ad
Part NumberUTV-SBI-CK

7. MaySpare


MaySpare Dual Battery Isolator Kit 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charger & Wiring Cable Kit

MaySpare #ad - Working voltage: having voltage sensitive chip, rely cuts in at 13. 3 volts and Cuts out at 12. 8 volts to ensuring primary Battery is Always Ready for Vehicle to Run.

12v, 13. 3v cut-in voltage, 140a, 12. 8v cut-out voltage, ; package Include All the Bits and Pieces Needed for a Complete Installation. Compatibility: this battery isolators are small and suitable for almost anywhere, UTV, for ATV, truck, RV's,marine vehicle, Boats, caravan. Lifetime warranty :100% high Quality and Enjoy Full Life Warranty, Free Exchange. Fuction:like having two separate power sources, the dual battery isolator kit enables Your Accessories to Run From a Separate Battery While the engine is not running on your vehicle While keeping your Main Battery Charged and Your Vehicle Always Ready to Go and Start When You Want It.
BrandMaySpare #ad
ManufacturerMaySpare #ad
Part NumberUS-Battery kit

8. Cole Hersee


Cole Hersee 48530 Smart Battery Isolator 200A

Cole Hersee #ad - Prevents loads on auxiliary battery from draining the starting battery. It reduces the load on the charging system by not connecting the auxiliary battery until the primary battery is charged to 13. 2v. It allows bi-directional charging from the alternator or from shore power. Smaller and lighter than traditional isolators. There are no efficiency losses due to diodes. It works with all types of alternator.
BrandCole Hersee #ad
Manufacturer48530 #ad
Weight1.2 Pounds
Part NumberCole Hersee